Adding and Subtracting Fractions with Unlike Denominators

Front

What is the first step when adding or subtracting fractions with unlike denominators?

Back

Find the least common multiple (LCM) of the denominators to create a common denominator.

Front

How do you convert a mixed number to an improper fraction?

Back

Multiply the whole number by the denominator, add the numerator, and place the result over the original denominator.

Front

Convert the mixed number 7 2/3 to an improper fraction.

Back

23/3

Front

What is the result of the operation \( \frac{19}{20} - \frac{3}{10} \)?

Back

\( \frac{13}{20} \)

Front

How do you simplify the fraction 42/84?

Back

Divide both the numerator and denominator by their greatest common divisor (GCD), which is 42, resulting in 1/2.

Front

Convert the mixed number 8 7/8 to an improper fraction.

Back

71/8

Front

What is the least common multiple (LCM) of 4 and 6?

Back

The LCM of 4 and 6 is 12.

Front

Why is it necessary to find a common denominator when adding or subtracting fractions?

Back

A common denominator allows you to combine the fractions accurately.

Front

What is the formula for finding the least common multiple (LCM) of two numbers?

Back

LCM(a, b) = (a * b) / GCD(a, b).

Front

If you have the fractions \( \frac{1}{4} \) and \( \frac{1}{6} \), what is their common denominator?

Back

The common denominator is 12.